Which one of the following will help to prevent rancidity of food containing fats and oil?

By keeping food in refrigerator

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By keeping food in sunlight

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By packing food materials in atmosphere of carbon dioxide

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By leaving food in open place unpacked

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Solution

The correct option is A By keeping food in refrigerator
When food containing fats and oils come in contact with oxygen in the air, it undergoes oxidation. This causes bad smell and change in taste. This whole process is called rancidity.
By keeping food in refrigerator, the food doesn't get oxidised easily due to low temperatures maintained by refrigerator.

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